Explanation

Explanation

 Momentum: p = mv  

Kinetic energy: KE = ½mv²

Set them equal:  

mv = ½mv²

Cancel m (mass ≠ 0):  

v = ½v²

Divide both sides by v (v ≠ 0):  

1 = ½v  

⇒ v = 2 m/s

Explanation

A Wheatstone bridge is an electrical circuit designed to measure unknown resistance accurately.

It works by comparing it with the known resistances in a balanced condition.

Explanation

The Doppler effect is applicable to all types of waves, including sound waves, light waves, and even water waves.

It describes the change in frequency or wavelength of a wave when there is relative motion between the wave source and the observer.

Explanation

According to Newton's 2nd Law, a constant force on a body produces a constant acceleration proportional to the force and inversely proportional to the mass.

The body does not move with uniform velocity unless the net force is zero.

Explanation

The SI unit of temperature as per the International System of Units is Kelvin.

It is represented by the symbol  K.

Note:

Celsius is currently a derived unit for temperature in the SI system, Kelvin is the base unit.

Explanation

In uniform velocity, distance increases linearly with time.

Hence, the distance–time graph is a straight line with constant slope.

Explanation

An isochoric process occurs at constant volume, meaning the system’s volume does not change.

In this process, any heat added changes only the internal energy and pressure, not the volume.

Explanation

The moon’s gravitational pull attracts ocean water, causing high and low tides.

This effect is strongest on the side of Earth facing the moon.

Explanation

Helium was first identified in the Sun’s spectrum in 1868 by Janssen and Lockyer using spectroscopy.

It was named after “Helios,” the Greek god of the Sun, before being discovered on Earth.